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(No Model.) 4'Sheets-Sheet. 1.

L,.PETZELT. SCHOOL SEAT.

' No. 513,413; PatentedJan; 23, 1894.

4 Sheets-Sheet 2.

L.PETZ EL.T. SCHOOL SEAT (No Model.)

Patented Jan. 23, 1894.

Fig. 3.

(No Model.)

L. PETZELT'.

4 SheetsSheet 3 SCHOOL SEAT.

Patented Jan. 23, 1894.

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(No Model.) '4 Sheets-Shem 4.

L.PE'I ZE LT.' SCHOOL SEAT.

No. 513,413. Patented Jan. 23, 1894.

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ATENT FFICE.

LINUS PETZELT, OF WOLLSTEIN, GERMANY.

SCHOOL- S EAT.

SPECIFICATION forming part of Letters Patent No. 513,4l3, dated January 23, 1894.

Application filed May 26, 1893.

To all whom it may concern.-

Be it known that I, LINUs PETZELT, of W011- stein, in the Province of Posen, in the German Empire, have invented new and useful Improvements in Seats for Scholastic and other Purposes, of which the following is a specification, reference being had therein to the accompanying drawings.

' This invention relates to seats for scholastic and other purposes and to improved meansv for rendering them adjustable.

The present invention has for its object to prov de an adjustable seat which is capable of being quickly opened out for use, and which, on the occupant rising therefrom, is caused to assume a closed position by the pressure of the legs exerted in straightening the same. The person, when standing, is thus enabled to occupy the space on the fioor over which, while sitting, the seat projected, a material saving in floor space being thereby effected.

If a number of the improved seats be arrangedln rows or groups, a convenient passage, Will be formed between the seats, when out of use, the several parts of which in the closed position are confined to the vertical planes of their uprights or supports. Seats adapted to accomplish, the above ob- Ject maybe constructed in two forms: the seat 1n one form being pliable and similar in act1on to a window blind, and in the other form rigid, the seat in both instances being supported by brackets.

Mylnvention is illustrated in the accompanylng drawings, in which- I Figure lrepresents a plan view of a seat opened out ready for use. Fig. 2- is a similar view of the seat closed. Fig. 3- is a. central yert1cal section of the seat open, and Fig. ls a front elevation of the seat closed. Fig. ois a plan View of a modified construction as. it appears in use. Fig. 6- is a view similar to Fig. 5 with the seat shown as out of use. Flg. 7 is a central vertical section. Fig. 8--

is a front elevation of the seat when not in use, and Fig. 9- is a vertical section of a further modification.

According to the improved mode of construction as represented in Figs. 1 to 4, the Seat portion 10 is constructed in a manner similarto that of a revolving shutter or win- 3 semi No, 475.599. (No model.)

dow blind. It is adapted to slide" partly into and out of the grooves or slots't', one of which is formed in each of the vertical uprights or supports, and, in so moving, to carry with it the brackets 7'. These brackets are pivoted at Z, and are furnished at the outer extremity of their horizontal part Z with antifriction rollers gwhereby the movement of the brackets is facilitated, and friction between the parts reduced to a minimum. The extremity of the part Z carrying the rollers g is caused to travel in a groove or recess in the crossbar d and thereby permits the seat to be supported at each end by the brackets W, as shown clearly in the sectional view Fig. 3, and in dotted lines in Fig. 1. A rail or flange cl is provided on the bar 01 for the purpose of retaining the rollers g in the groove.

In operating a seat constructed according to this arrangement if it be desired to extend the seat It so as to bring it into the position shown in Figs. 1 and 3, the bar d is pulled forward and with it the brackets W carrying the rollers g, the arm-rests A which may be formed in one piece with the brackets W being caused to take up their position in or about the vertical plane of the said brackets. The seat is now in position for use. If it be desired to close the seat or put it out of use the press front edge similar to the groove in the front bar of the form previously described, which groove is engaged by the rollers on the ends of the brackets. It will thus be seen that pressure upon the front edge of the seat when in the .position it assumes when in. use as shown in Fig. 5-- will cause it to slide backward into the position shown in Fig. 6, the ends of the brackets with the rollers travel ure exerted by the legs of the occupant, in

mg toward each other until they are in close proximity.

In order to support the rear side of the seat when 1t is pushed back and the brackets W are 1n the position shown in Fig. 6- supplemental brackets W are provided,'which are rigidly connected with the brackets W or w1th the pivot shaft thereof, so that as the seat is pushed back and the front brackets swlng 1nto a position more nearly parallel with the front edge of the seat, the brackets W extend toward the rear until when the seat 1s pushed completely back they extend nearly at right angles across the same and serve to support it effectually in this position, and it may then be occupied without danger of straining the parts. I

When it is not desired to use the seat in its backward position, the supplemental brackets may be dispensed with and the rear portlon of the seat hinged as shown at It in Fig. 9 so that as the seat is pushed back, the hinged portion will drop to a vertical position as soon as it clears the rear or pivoted ends of the brackets.

When anumber of seats as abovedescribed are arranged in rows or groups, they will be found to occupy Very little of the available space, and a free passage or thoroughfare will be afforded on all sides, and in all directions. 30

front portion extending at right angles to the 3 5 line of movement of said seat, and supporting brackets pivoted in the frame and having their front ends movably connected with said guideway, substantially as described.

In witness whereof I have hereunto set my 0 hand in presence of two witnesses.

LINUS PETZELT.

Witnesses:

PAUL FISCHER, JOHN SALOUSKY. 

